T(n,k)=Number of nXnXn triangular 0..k arrays with some element plus some adjacent element totalling k exactly once.
A270256
T(n,k)=Number of nXnXn triangular 0..k arrays with some element plus some adjacent element totalling k exactly once.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =12a(5) =0a(6) =0a(7) =24a(8) =66a(9) =0a(10) =0a(11) =48a(12) =768a(13) =468a(14) =0a(15) =0a(16) =72a(17) =4428a(18) =37848a(19) =3612a(20) =0a(21) =0a(22) =108a(23) =14976a(24) =772056a(25) =3280968a(26) =40020a(27) =0a(28) =0a(29) =144
External references
- oeis: A270256